Elevator casing



Feb. 7, 1928.

N. M. LowE Er AL ELEVATOR CASING Filed Feb. a. 1925 flaw M 7 M A im m MM a4 M, a? Z {4 Patented 1 -.1. 7,1928.

UNITED STATES PATENT OFFICE.

NATHAN a. Lownn ANID' PAUL LLISON xnronrnn, or rrrrsnuaen, PENNSYL- VANIA, Assrenoas TO nocomo'rrvn s'roxna COMPANY, A CORPORATION or PENN- SYLVANIA.

ELEVATOR CASING.

Application filed February 9, 1925. Serial No. 7,833.

This invention relates to stokers, and more particularly to the fuel elevating mechanism. The principal object of the invention is the provision of a new and improved elevator mechanism that is'so constructed that fuel may be advanced upwardly through the same positively and efficiently Another object of the invention is the provision of new and improved means for as- 1 sisting the screw elevator in its work of elevating the fuel delivered to the firebox.

Other objects of the invention are the provision of a new and improved elevator cas ing that is simple in construction, eflicient in use, and that is not likely to become broken,

distorted or get out of order.

Other and further objects and advantages of the invention will appear from the following description taken in connection with the 2 accompanying drawings, in which Fig. 1 is a vertical section of the back head of a locomotive showing our invention in position thereon, with parts in section and parts broken away; and Fig. 2 is a section on line 2-2 of Fig. 1. On the drawings the reference character 10 designates the backhead of a locomotive provided with the opening 11 through which the distributormember 12 of the stoker 13 80 is adapted to extend.

The stoker mechanism includes one or more elevator casings 14, only one of which is shown, within which is rotatably mounted the screw elevator screw 15. The casing is provided with a suitable door opening 7 through which access may be had to the interior thereof; A door or closure 8 is adapted to be secured over the opening 7 by any suitable means, as the fastening members 40 9. The elevator is rotated in any approved manner for elevating the fuel delivered to it from the tender by the conveyor screw as is usual in such constructions. Since the details of the stoker mechanism other than the I elevator casing constitute no part of the presof the casing is provided with a plurality of grooves 16. The door or closure 8 may, if desired, be provided with correspondln grooves 20 which are adapted to align wit the grooves 16 in the casing. The grooves are deeper at one margin and may be considered .as being triangular in cross-section, formmg inclined sur aces termlnatmg in;

ribs or projections 17 with shoulders 18 whereby the fuel may slide upwardly over the shoulders, the shoulders preventing rotation of the fuel during its elevation, as will appear from an inspection of Fig. 2.

The grooves may be arranged in any suitable manner extending longitudinally of the casing, so long as the shoulders face in the direction to engage the fuel to prevent the same from rotating with the elevator. As shown on the drawings, the ribs and grooves are arranged s irally in the opposite direction from the Y 15 whereby as the elevator rotates it will tend to slide the fuel in engagement with the shoulders 18 upwardly along the same, the shoulders constituting projections or ribs for preventing the fuelfrom rotating with the screw.

It is thought from the foregoing taken in connection with the accompanying drawings that the construction and operation of our device will be apparent tothose skilled in the art, and that various changes in size, shape, proportion and details of construction may e made without departing from the spirit and sco e of the appended claims.

We 0 aim as our invention:

1. In a stoker, an elevator casing havin inclined'grooves on its inner surface, eac groove bein formed bya shoulder and an inclined sur ace.

- 2. In a stoker, an elevator. casin having inclined shoulders on its inner sur ace, and inclined surfaces'leading upwardly and inwardly to form said shoulders.

3. In a stoker, an elevator casing, said casing being provided with inclined projections on its inner. wall, said projections having their lower surfaces inclined upwardly and inwardly. T

4. In a stoker, an elevator casing having a door opening therein, a door for said opening, said door being provided with inclined grooves, and a screw elevator within said casing, said casing being provided with inght 19 of the screw elevatorclined grooves on its inner wall, the grooves one side than at the other, whereby a shoulon said door being continuations of the adder is formed for resisting the rotation of jacent grooves on said Wall. fuel during its elevation by said elevator. 10

5. In a stoker, an elevator casing, a screw In testimony whereof we aifix our signa- 5 elevator rotatably mounted in said casing, tures.

said casing being provided with a groove on NATHAN M. LOWER. its inner surface, said groove being deeper at PAUL ALLISON KETCHPEL. 

